Narrow coal pillar protection device

The invention relates to the technical field of coal mining, in particular to a narrow coal pillar protection device. The invention provides a narrow coal pillar protection device which can effectively control the stability of a gob-side entry driving free-side narrow coal pillar so as to guarantee safe and efficient mining of an underground working face. A narrow coal pillar protection device comprises anchor rods, gaskets, nuts, a reinforcing mechanism and a butt joint mechanism, the number of the anchor rods is two, the front portions of the anchor rods are connected with the gaskets in a sliding mode, the front sides of the gaskets are connected with the nuts in a rotating mode, the nuts are connected with the adjacent anchor rods in a threaded mode, the reinforcing mechanism is arranged between the anchor rods, and the butt joint mechanism is arranged on the reinforcing mechanism. The vertical I-shaped steel and the transverse I-shaped steel are combined through alignment of the first alignment grooves a